Sorry, I would help you if I could.  However, I never use a dildo.  Don't find it necessary.  The size; length & circumference, of the object you like to have or otherwise inserted might serve as a guide of the glass dildo you desire. Better yet, the real thing would achieve your desired result & dismiss you of the necessity of a dildo.

Glass dildo's huh?

You learn something every day in the Florida boards.

But they revolve around Sofla, a gallon of Crisco, a trapeze and recreational lawn tools.

Believe they were the original and have a wide variety to choose from.

I've got 3 different ones and it might be time to get another.

I found many of the ladies like this one:

just saying =

it is kind of knobby with a bend in it and two different shaped heads on each end. Best way to use it is go slow and let the lady control it with her muscles - great toy as long as you remember its solid and completely unforgiving....